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Sonus Media Gateway Chosen by Motorola for Wireless Operator Customers Worldwide

CHELMSFORD, Mass., February 24, 2004 – Sonus Networks (Nasdaq: SONS), a leading provider of carrier packet voice infrastructure solutions, today announced that Motorola Inc. and Sonus have established an original equipment manufacturer (OEM) relationship through which Motorola has integrated Sonus’ industry-leading GSX9000 media gateway with the Motorola SoftSwitch (MSS), a next-generation switching platform for wireless carriers around the globe.

“The relationship we have forged with Motorola provides an important global sales and support channel for Sonus, and extends our reach into the wireless access market,” said Hassan Ahmed, president and CEO, Sonus Networks.  “Wireless operators are ready to take the next step in the migration to next-generation networks, and we are very excited to be working with Motorola to further the adoption of packet voice technologies in the wireless world.”

“Working with Sonus further strengthens Motorola’s wireless packet voice offering, giving our customers even greater options for their networks,” said Murali Aravamudan, vice president and general manager, Winphoria Division of Motorola’s GTSS.  “The integration of the GSX9000 into the Motorola SoftSwitch   provides significant advantages over traditional switching technologies, including lower acquisition and operating costs, rapid deployment cycles and increased flexibility.”  

“The GSX9000 combines advanced DSP technology and mature, fully featured software, making it particularly well suited for deployment with major service providers worldwide.  A single GSX9000 chassis can support up to 22,176 simultaneous VoIP calls and up to 28,224 DS0s.  The NEBS-compliant GSX9000 provides fully redundant configurations that are designed for 99.999% availability. 

About Motorola

“Motorola, Inc. (NYSE: MOT) is a global leader in wireless, broadband and automotive communications technologies that help make life smarter, safer, simpler, synchronized and fun. Sales in 2003 were US$27.1 billion. Motorola creates innovative technological solutions that benefit people at home, at work and on the move. The company also is a progressive corporate citizen dedicated to operating ethically, protecting the environment and supporting the communities in which it does business. For more information: www.motorola.com

About Sonus Networks

“Sonus Networks, Inc. is a leading provider of packet voice infrastructure solutions for wireline and wireless service providers.  With its Open Services Architecture (OSA), Sonus delivers end-to-end solutions addressing a full range of carrier applications, including trunking, residential access and Centrex, tandem switching, and IP voice termination, as well as enhanced services.  Sonus’ award-winning voice infrastructure solutions, including media gateways, softswitches and network management systems, are deployed in service provider networks worldwide.  Sonus, founded in 1997, is headquartered in Chelmsford, Massachusetts.  Additional information on Sonus is available at http://www.sonusnet.com.

This release may contain projections or other forward-looking statements regarding future events or the future financial performance of Sonus that involve risks and uncertainties.  Readers are cautioned that these forward-looking statements are only predictions and may differ materially from actual future events or results.  Readers are referred to the “Cautionary Statements” section of Sonus’ Quarterly Report on Form 10-Q, dated November 10, 2003 and filed with the SEC, which identifies important risk factors that could cause actual results to differ from those contained in the forward-looking statements. 

Risk factors include, among others, unforeseen issues encountered in the completion of the Company’s independent investigation and the year-end audit, the continued adverse effect of developments in the telecommunications industry, Sonus’ ability to grow its customer base, dependence on new product offerings, market acceptance of its products, competition from large incumbent vendors, rapid technological and market change and manufacturing and sourcing risks.  In addition, any forward-looking statements represent Sonus’ views only as of today and should not be relied upon as representing Sonus’ views as of any subsequent date.  While Sonus may elect to update forward-looking statements at some point, Sonus specifically disclaims any obligation to do so.

Sonus is a registered trademark of Sonus Networks.  Open Services Architecture, GSX9000, Insignus and Sonus Insight are trademarks of Sonus Networks.  All other trademarks, service marks, registered trademarks, or registered service marks are the property of their respective owners.